Abstract
The materials used for this study consisted of 61 cases, (ranging between viviparity 5 months to 79 years of age).
The cases in which the diseases of the nose, mouth, pharynx and larynx were the direct cause of death were excluded.
Most of the ethmoid, nasal septum and concha nasalis media were extirpated intracranially between the posteior end of the crista frontalis and the sulcus faciculi optici without injuring the face.
After embedding in celloidin, a gross and microscopic examination of their frontal section was made. The form was complicated between the beginning portion of the conch nasalis media and the canopy of the ethmoid. Especially, the operative significance of the inner wall of the attic of the ethmoidal sinuses has been stressed from a clinicoanatomical point of view.
